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47 lines
1.2 KiB
47 lines
1.2 KiB
2 years ago
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export const filterNames = new Set([
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"first",
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"last",
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"eq",
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"gt",
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"nth",
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"lt",
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"even",
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"odd",
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]);
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export function isFilter(s) {
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if (s.type !== "pseudo")
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return false;
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if (filterNames.has(s.name))
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return true;
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if (s.name === "not" && Array.isArray(s.data)) {
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// Only consider `:not` with embedded filters
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return s.data.some((s) => s.some(isFilter));
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}
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return false;
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}
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export function getLimit(filter, data, partLimit) {
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const num = data != null ? parseInt(data, 10) : NaN;
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switch (filter) {
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case "first":
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return 1;
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case "nth":
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case "eq":
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return isFinite(num) ? (num >= 0 ? num + 1 : Infinity) : 0;
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case "lt":
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return isFinite(num)
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? num >= 0
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? Math.min(num, partLimit)
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: Infinity
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: 0;
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case "gt":
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return isFinite(num) ? Infinity : 0;
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case "odd":
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return 2 * partLimit;
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case "even":
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return 2 * partLimit - 1;
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case "last":
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case "not":
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return Infinity;
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}
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}
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//# sourceMappingURL=positionals.js.map
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